The emergency stop (E-stop) is a crucial safety feature on a CNC router, designed to immediately halt machine operation in case of an emergency. When activated, it cuts power to the machine, stopping all movement and preventing further operation to protect users and equipment. If you encounter an emergency, press the E-stop right away—doing so won't damage the machine and is crucial for preventing accidents and swiftly addressing unforeseen issues. The E-stop is also useful for temporarily halting the machine while you swap tools, preventing accidental starts and ensuring safety during the process. 

The breaker connected to the CNC machine safeguards against electrical overloads and short circuits by automatically cutting off the power when necessary. To turn it on, simply switch the breaker to the "On" position, ensuring it clicks into place securely. To turn it off, move the breaker to the "Off" position, which will disconnect the power and stop the machine. Always ensure the machine is turned off and unplugged before you hit the breaker when you're done using it.

The tool assembly on a ShopSabre CNC machine consists of a collet, a bit, and a spindle nut. The collet securely holds the bit in place, while the bit performs the cutting or shaping of materials. The spindle spins the bit to handle various tasks, and the spindle nut ensures everything stays tightly secured during operation. This setup allows you to change the bit to find the right one for each job, ensuring effective tool changes and precise cuts. 

The Shop Sabre Software is installed on the PC next to the CNC machine and serves as the control system for managing machining projects. It allows for the creation and import of designs, the setup of machining parameters, and the generation of precise toolpaths for cutting and shaping materials. The software communicates with the machine, identifying material placement and executing specific actions, ensuring accurate and consistent results throughout each project.